ISRO Technician-B Electrician Question Paper - 2017 (Set - 1) with Answer Key

ISRO Technician-B Electrician Question Paper - 2017 (Set - 1) with Answer Key

61) In order to increase the range of a voltmeter

Answer is:

A high resistance is connected in series

Explanation:

To increase the range of voltmeter we need to connect a high resistance in series. So, that equivalent resistance is more, So, range is more.

In order to increase the range of a voltmeter

62) In a constant voltage charging method of battery, the charging current from discharged to fully charged condition

Answer is:

Decreases

63) A multimeter cannot measure

Answer is:

Charge

A multimeter cannot measure

64) We have to make a heater of 1kW rating from 2kW heating elements. This is possible by taking

Answer is:

Two elements each of 2kW rating and connect them in series

65) A 250V lamp has a total flux of 3000 lumes and takes a current of 0.8 ampere from 250V mains. Its luminous efficiency is

Answer is:

15 lumens per watt